Investigation of the Effects of the QBO and the Solar Cycle on the Extratropical Atmosphere

QBO 和太阳周期对温带大气影响的研究

• 批准号: 9013280
• 负责人: Mark Baldwin
• 金额: $ 8.32万
• 依托单位: NorthWest Research Associates, Incorporated
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1993-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9013280&HistoricalAwards=false
• 关键词: Investigation; Effects; QBO; Solar; Cycle

Recent results show a sun/climate relationship subject to modulation by equatorial stratospheric winds, viz. the quasibiennial oscillation (QBO). These results show responses of the atmospheric meteorological parameters to solar activity from the mesosphere down to the troposphere seem to be dependent on the QBO phase. This relationship will be examined in the context of atmospheric variables with emphasis on the link between the QBO and the extratropical atmosphere. This involves a two-fold effort: the investigation of the statistical significant of the solar/QBO/weather (climate) relationship, and the study of dynamical links between tropical and extratropical variability. The statistical testing will involve the use of data from the surface to 10 mb, in all seasons. Particular attention will be paid to details such as definition of the QBO phase, selection of averaging periods, and possibilities of QBO modulation in either or both QBO phases. The investigation of dynamical links will involve examining atmospheric data from the surface to 1mb for evidence of QBO modulation of the extratropical atmosphere. Since a mechanism for the QBO/extratropics connection may involve modulation of planetary wave propagation, emphasis will be given to the propagation of planetary waves and their interaction with the mean flow.

最近的研究结果表明，太阳/气候关系受赤道平流层风的调制，即准两年一次的振荡（QBO）。这些结果表明，从中间层到对流层，大气气象参数对太阳活动的响应似乎依赖于QBO相位。这种关系将在大气变量的背景下加以研究，重点是QBO和温带大气之间的联系。这涉及两方面的努力：调查太阳/QBO/天气（气候）关系的统计意义，以及研究热带和温带变率之间的动力联系。统计测试将涉及在所有季节使用从地表到10mb的数据。特别注意的是细节，如QBO相位的定义，平均周期的选择，以及QBO调制在一个或两个QBO相位的可能性。动力联系的调查将包括检查从地表到1mb的大气数据，以寻找QBO调制温带大气的证据。由于QBO/温带联系的机制可能涉及行星波传播的调制，因此重点将放在行星波的传播及其与平均气流的相互作用上。